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Diffusion of Fe and Na in co-evaporated Cu(In, Ga) Se-2 devices on steel substrates
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. (Ångström Solar Center)
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2013 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 535, p. 188-192Article in journal (Refereed) Published
Abstract [en]

In this work we study impurity diffusion into Cu(In, Ga) Se-2 from stainless steel substrates with and without Cr diffusion barriers using secondary ion mass spectrometry. For these substrate configurations we compare cases with and without adding NaF as a sodium precursor. A clear increase in impurity diffusion from the substrate is observed for samples with NaF. Devices made using our micro pilot line show the expected correlation between Fe content, Na content and efficiency, but the highest device efficiency obtained for steel substrates is still slightly below that of the glass substrate reference. We discuss reasons for the observed device performance.

Place, publisher, year, edition, pages
2013. Vol. 535, p. 188-192
Keywords [en]
Copper indium gallium selenide, Steel substrate, Sodium fluoride
National Category
Engineering and Technology Natural Sciences
Research subject
Engineering Science with specialization in Electronics
Identifiers
URN: urn:nbn:se:uu:diva-203300DOI: 10.1016/j.tsf.2012.11.067ISI: 000318973600042OAI: oai:DiVA.org:uu-203300DiVA, id: diva2:636132
Conference
Symposium B on Thin Film Chalcogenide Photovoltaic Materials of the 11th E-MRS Spring Meetings, MAY, 2012, Strasbourg, FRANCE
Available from: 2013-07-08 Created: 2013-07-08 Last updated: 2017-12-06Bibliographically approved

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